"I will never understand why people give pregnant women such a hard time," showbizspy.com quoted the 33-year-old as saying.

"We are creating a human life: I think we get every excuse in the world to eat a doughnut! It's very hurtful, especially when you're so emotional and going through all of these hormonal changes. I felt for Kim Kardashian - I knew exactly what she was going through.

"I am just one of those pregnant women who gains a lot of weight. I have really big b**bs. I have my curves. Even trying as hard as I did with ace, I still gained," she added.

Simpson and her husband Eric Johnson were reportedly paid $100,000 by a magazine to acquire the first photographs of their newborn son Ace Knute.